Erythritol, the main ingredient in Truvia, has recently been found toxic to fruit flies, yet safe for humans. Researchers at Drexel University believe there is promise of a "safe for humans" insecticide. Erythritol is a naturally occurring sugar alcohol . Stevia rebaudiana plant, native to South America,is the sweetening agent in Truvia and many other natural sweeteners. However,Truvia is 90% erythritol, an F.D.A. approved food additive. Scientists have discovered it is this ingredient in Truvia that makes it toxic to many pests. Patents are pending for a new , natural insecticide. First, erythritol must be proven safe for birds, animals and beneficial insects.